[DEPENDABOT] Update: Bump django-pghistory from 3.5.2 to 3.6.0

Bumps [django-pghistory](https://github.com/AmbitionEng/django-pghistory) from 3.5.2 to 3.6.0.
- [Release notes](https://github.com/AmbitionEng/django-pghistory/releases)
- [Changelog](https://github.com/AmbitionEng/django-pghistory/blob/main/CHANGELOG.md)
- [Commits](https://github.com/AmbitionEng/django-pghistory/compare/3.5.2...3.6.0)

---
updated-dependencies:
- dependency-name: django-pghistory
  dependency-version: 3.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -12,7 +12,7 @@ pyjwt==2.10.1
 # Database
 psycopg2-binary==2.9.10
 dj-database-url==2.3.0
-django-pghistory==3.5.2  # For model history tracking
+django-pghistory==3.6.0  # For model history tracking
 
 # Email
 requests==2.32.3  # For ForwardEmail.net API
@@ -32,7 +32,7 @@ pycountry==24.6.1
 
 # Development
 black==25.1.0
-flake8==7.2.0
+flake8==7.1.1
 pytest==8.3.4
 pytest-django==4.10.0